Improvement in chairs



UNI'IEID STATES PATENT OFFICE.

GEORGE O. WINCHESTER, OF ASHBURNHAM, MASSAOHUSETTS.

IMPROVEMENTJN CHAIRS.

Specification forming art of Letters Patent N0. 117,132, dated J uly 18, 1871 antedated Ju1y 6, 1871.

T0 roll whom z't mag concern:

Be it known that I, GEORGE C. WINCHESTER, 0f Ashburnha-m, in the cou11ty of Worcester and State 0f Massachusetts, have invented an 1111- provement 111 Chairs; and 1 (10 hereby decla-re that oho following, taken in connection with Ehe drawing which accompanies and f01111s part cf this specification, is a description ofmyinvention, suflicient to enable those skilled in the art so practice it.

United States Letters Patent N0. (30,978 were granted, J anuary l, 1867, 011 the i11vention of M. V. B. Howe-and myself, f01 an improvement in chairs. In such patented chair oho seat is supported upon a stationa-ry stoo1 (near the back of the seat) by means 0f ba-ll-and-socket joints, which permit the seat to tip o1 1ock f1ee] y, oho

front of the sea-t, when in a horizontal position,'

resting upon tl1e top of two posts projecting up fr01n the top 0f the stoolframe ove1 the front legs 0f the stool.

My present invention may be considered as an improvement 11p011 the invention shown in such patent, as the seat 111 my improvcd chair is supported and tips upon the S001 by means of balL and-socket joints. Inst-021d, however, of applying these joints t0 t]1e top of thc st001 and so tha-t the chair rocks 011 pivots 0ve1 the sto0], I pivot the Seat 11p011 side stretche1s, extending up 0f the front legs b, t0p rails e, back 1egs f, (the top rail and back leg at each side being made 01 0110 piece 0f wood bent 111150 shape, as shown in said patent N0. 60,978) cross-bars or rods g, and a stretcher, c, this stretcher c uniting the two ra11s e nea1 ehe front ends thereof, as seen in the drawing. T0 ehe immer side of each side bar g 1s fixed a socket-piece, h, having a socket fo11ned t0 receive a globular foot, z, 011 the botc-0m end of a leg, k, which bifurcates just above the foot int0 owo arts, l, depending f10111 opposite ends 0f a p1ate, m, screwed to he under side 0f the sea, as seen at A a11(1 C. T110 seat is supported up0n and with reference '00 the stool by the two bifurcaed leg-pieces k, wl1ich extcn(l down inside of the 1*ails e, and have 1311011 ballshaped feet l resting in the socket-bearings n in ehe pieces h, a11d eac]1 socket is lengthened ab top so as to permit a rocking movement of tl1e 1egs and the chair-seat suppored by the1n, 11116 f1011t men1be1of each leg bringing up agains the immer side 0f ehe stretcher 0 when the seat is b10ught 111t0 horizontal position, and the exten of tipping-back movemen of the seat being detennined by any suitab]e st0ps o1 by hc 0011- tractile powe1 of a coiled or spiral spring, 0. This spring 0 is located under the seat, and is attached a1; its f1011t end t0 the stretcher c, and ab its 1ear 011d t0 13110 rear part 0f tl1e sea-t, as see11 ab B, and when ehe seat is tipped back (as secn by the dotted lines ab B) the Stress 0f the sp1in g tcnds 130 throw 113 forward again. 'lhe Seat 1nay be retained in p0sit-ion, 111010 or less inclined or tipped back, by a 1atch 01 swing-catch, p, having teeth, any 011e 01' which may be thrown in fronb of t-he adjacent leg-piece l, so as t0 prcvent the said leg from moving forward.

A011ai1 made as' shown and described is exceedingly S131011g, is easily manipulated, and is very simple as regards the construction and a1- rangement, which have reference t0 the tipping seat.

A tipping chair, having the globular fecti piv- 0ted in sockct-picces h, and having also the lever- 1atch 19 for locking the seat in a tipped position, and a retractile spring, 0, applied as.shown a11d described.

WVitnesses: GEO. O. WINCHESTER.

FRANOIS GOULD, M. W. FROTHINGHAM. 

